Book Image

Continuous Integration, Delivery, and Deployment

By : Sander Rossel
Book Image

Continuous Integration, Delivery, and Deployment

By: Sander Rossel

Overview of this book

The challenge faced by many teams while implementing Continuous Deployment is that it requires the use of many tools and processes that all work together. Learning and implementing all these tools (correctly) takes a lot of time and effort, leading people to wonder whether it's really worth it. This book sets up a project to show you the different steps, processes, and tools in Continuous Deployment and the actual problems they solve. We start by introducing Continuous Integration (CI), deployment, and delivery as well as providing an overview of the tools used in CI. You'll then create a web app and see how Git can be used in a CI environment. Moving on, you'll explore unit testing using Jasmine and browser testing using Karma and Selenium for your app. You'll also find out how to automate tasks using Gulp and Jenkins. Next, you'll get acquainted with database integration for different platforms, such as MongoDB and PostgreSQL. Finally, you'll set up different Jenkins jobs to integrate with Node.js and C# projects, and Jenkins pipelines to make branching easier. By the end of the book, you'll have implemented Continuous Delivery and deployment from scratch.
Table of Contents (15 chapters)

Building a REST service

The first thing we have to do is create a little REST service. Representational State Transfer (REST) basically means that a service is stateless and makes use of the standard HTTP verbs like GET, PUT, POST, and DELETE. That makes it a bit easier for us to write. We can create a RESTful service using Node.js and Express, pretty much like we did before. So, create a new folder and name it web-api or some such. Next, we need our package.json file, so start up a command prompt and use the npm init command. You can leave all the defaults, as we are not really going to do anything with them anyway. Next, we can install Express, the body-parser, and the command-line-args package:

npm install express --save
npm install body-parser --save
npm install command-line-args --save

We can now set up our bare bones script that allows us to at least run the application:

var...